& (1) & (2) & (3) & (4) \\ 
\textbf{Dropping partially treated} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\ \midrule
Post $\times$ Intensity&    0.087\sym{***}&    0.098\sym{**} &   -0.029         &    0.066\sym{*}  \\
                &  (0.021)         &  (0.047)         &  (0.045)         &  (0.038)         \\
\midrule
Observations    &     2800         &     2800         &     2800         &     2787         \\
DV Mean         &    0.370         &    1.571         &    0.781         &    1.186         \\

\midrule \\ \textbf{Region-specific trends} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\ \midrule
Post $\times$ Intensity&    0.073\sym{***}&    0.117\sym{**} &    0.002         &    0.081\sym{**} \\
                &  (0.023)         &  (0.052)         &  (0.047)         &  (0.040)         \\
\midrule
Observations    &     2520         &     2520         &     2520         &     2507         \\
DV Mean         &    0.370         &    1.571         &    0.781         &    1.186         \\

\midrule \\ \textbf{Using 1975-1997 sample} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\ \midrule
Post $\times$ Intensity&    0.085\sym{***}&    0.105         &    0.026         &    0.090\sym{**} \\
                &  (0.026)         &  (0.067)         &  (0.061)         &  (0.045)         \\
\midrule
Observations    &     2127         &     2127         &     2127         &     2122         \\
DV Mean         &    0.370         &    1.571         &    0.781         &    1.186         \\

\midrule \\ \textbf{5 year cohorts} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\ \midrule
Post $\times$ Intensity&    0.093\sym{***}&    0.125\sym{***}&   -0.009         &    0.090\sym{**} \\
                &  (0.020)         &  (0.045)         &  (0.047)         &  (0.037)         \\
\midrule
Observations    &     3177         &     3177         &     3177         &     3162         \\
DV Mean         &    0.370         &    1.571         &    0.781         &    1.186         \\

\midrule \\ \textbf{Drop populated CRs} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\ \midrule
Post $\times$ Intensity&    0.122\sym{***}&    0.215\sym{***}&    0.023         &    0.106\sym{**} \\
                &  (0.026)         &  (0.063)         &  (0.064)         &  (0.048)         \\
\midrule
Observations    &     2254         &     2254         &     2254         &     2240         \\
DV Mean         &    0.370         &    1.571         &    0.781         &    1.186         \\

\midrule \\ \textbf{Adding age as a control} & \multicolumn{1}{c}{Economic index} &  \multicolumn{1}{c}{Interest index}  &  \multicolumn{1}{c}{Participate index}  &  \multicolumn{1}{c}{Checks on pres} \\ \midrule
Post $\times$ Intensity&    0.090\sym{***}&    0.125\sym{***}&   -0.018         &    0.094\sym{**} \\
                &  (0.020)         &  (0.045)         &  (0.047)         &  (0.037)         \\
\midrule
Observations    &     3177         &     3177         &     3177         &     3162         \\
DV Mean         &    0.370         &    1.571         &    0.781         &    1.186         \\
